Spokeshave



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ELIJAH HOLMES, OF LYNN, MASSACHUSETTS.

SPOKESHAVE.

To all whom t may concern Be it known that I, ELIJAH HOLMES, of Lynn, inthe county of Essex and State of Massachusetts, have invented anImprovement in Spokeshaves; and I do hereby declare that the same isfully described and represented in the following specification and theaccompanying drawings, of which- Figure 1, represents a top view of aspoke shave provided with my improvement. Fig. 2, is a bottom view ofit. Fig. 3, a rear elevation, and Fig. 4, a longitudinal and verticalsection of it. Fig. 5, is a transverse and vertical section of it.

My invention relates to the method of adjusting the knife or cutter A,with respect to the stock, B, and for this purpose, and in order tofasten the knife in position, I form the two ends of t-he knife withchamfers as seen at a, a, in Figs. 3 and 4, and I also form the stockwith a dovetail socket or sockets as seen at b, Z), to receive saidchamfers, they being arranged as seen in the drawings. Through one ofthese sockets and the stock I extend a screw, c, it being made so thatits head shall lap over one of the chamfers, a, as seen in Fig. 4. 'Iothis screw I apply a clamp nut as seen at e. When the nut is turned upagainst the stock, it will draw the head of the screw down upon theknife so as to force the knife longitudinally away from the screw andhard into the opposite socket, b, and so as to confine the knife firmlyin place by means of the single screw, its nut and the two sockets. Ingeneral two screws are employed to confine the knife in place.

The above mode of fastening not only saves the use and cost of onescrew, but enables the knife to be used without having the screwattached directly to it. Each end of the knife rests on a shoulder orplane g, L, (see Fig. 5) which is inclined with respect to the guide e',of the stock, B, and so that by ruiming the knife forward toward theguide, the depression or distance of its cutting edge below the bearingsurface of said guide may be changed or increased in order to vary thethickness of the shaving cut by the knife. A rearward movement of theknife will decrease the transverse distance of its cutting edge from thesaid surface. By means of such inclined shoulders, so arranged withrespect to the gage or guide, I am enabled to dispense with the usualmovable and adjustable mouth piece and its adjustments commonly appliedto spoke shaves.

I do not claim the manner of fastening the knife, viz, by a single-screwclamp, chamfers and sockets as described, but what I do claim is-Supporting the ends of the knife on planes or shoulders inclined orarranged with respect to the bearing surface of the stock substantiallyin manner as specified, and so as to enable the distance of the cuttingedge of the knife from the said bearing surface to be changed in the wayand for the purpose as explained.

In testimony whereof I have hereunto set my signature this sixteenth dayof October A. D. 1855.

ELIJAI-I HOLMES.

Witnesses:

It. H. EDDY, F. P. HALE, Jr.

